Here’s a quick update to the earlier post on a new unpatched Adobe Flash vulnerability.  Through looking for sites serving these SWF exploits we’ve found a connection with recent mass hacks.  Hacked sites reference an external script, just as they have for quite some time.  But, the external scripts now reference an SWF file.  This SWF file references another SWF file named: WIN%209,0,124,0i.swf (WIN 9,0,124,0i.swf), which seems to be off-line.  While we can not confirm this last SWF file attempts to exploit this new vulnerability, Symantec mentioned the same domain serving the exploit earlier.  SANS also mentions another domain, and 2 presumed exploits, named WIN%206,0,79,0ff.swf (WIN 6,0,79,0ff.swf), and WIN%206,0,79,0ie.swf (WIN 6,0,79,0ie.swf) also off-line.  These file names suggest 3 things.

1) Different exploits are crafted to exploit different versions of Adobe Flash, in this case 9,0,124,0 and 6,0,79,0.
2) Versions of the exploit may also exist, or be under development, to target other operating systems, as the aforementioned file names begin with WIN.
3) Exploits exist for both Internet Explorer and Firefox, as the file names end in “i”, “ie”, or “ff”

Thus far we’ve identified 2 particular domains involved in mass hacks that are also believed to have served these Flash exploits.  Combined, Google yields approximately 250,000 page results when searching for those references (ie. compromised sites that link to scripts that link to flash exploits).

Again this threat is still under analysis, more details to follow.